0445010136 Fuel Pump – Bosch-Compatible CP1H3 / CP1 Common Rail High-Pressure Pump for Diesel Engines
The 0445010136 common rail diesel fuel pump (Bosch compatible) is a high‑pressure radial piston pump from the renowned CP1 / CP1H3 series. This pump served as the foundation for early common rail systems, delivering reliable fuel pressurisation up to 1,350–1,600 bar for a wide range of passenger cars, vans, and light trucks. Whether you are maintaining a classic Mercedes‑Benz CDI, a modern Hyundai CRDi, or an industrial diesel engine, the 0445010136 pump provides direct, OE‑spec replacement performance. Below we examine its structural advantages, engine compatibility, common failure modes, installation best practices, and why Rsolid engine parts is your trusted supplier.
1. Structural Advantages of the 0445010136 Fuel Pump
The 0445010136 belongs to Bosch‘s pioneering CP1 (Common Rail Pump 1) and CP1H3 families, offering these engineering strengths:
Three‑plunger radial piston design – Three hardened steel plungers driven by an eccentric shaft deliver smooth, high‑volume fuel flow with low pressure pulsation, ensuring stable rail pressure from idle to maximum engine speed.
Compact and lightweight construction – The CP1 series is significantly smaller than later CP3 pumps, making it ideal for engine bays with limited space while still providing adequate flow for 4‑cylinder and some 5‑cylinder diesel engines.
Integrated pressure control (PCV) – Some variants use a pressure control valve on the pump outlet to regulate rail pressure; other versions rely on the rail pressure control valve. The 0445010136 is typically used with an external rail pressure regulator.
High‑strength cast iron housing – Resists deformation under high pressure and provides excellent thermal management, prolonging pump life in demanding conditions.
Direct gear or belt drive – Standardised mounting flange and drive coupling allow quick bolt‑on replacement without modifications.
Modular design – The CP1 pump can be serviced with replaceable plunger assemblies and seals, though professional Bosch‑certified service is recommended.
These features make the 0445010136 a durable, serviceable, and cost‑effective choice for older common rail systems.
2. Compatible Engine & Vehicle Models – For 0445010136 CP1 / CP1H3 Pump
The 0445010136 high‑pressure pump is widely used on early common rail diesel engines from the late 1990s to mid‑2000s. Primary applications include:
Detailed vehicle list:
| Make | Model | Years | Engine Code(s) | Notes |
|---|
| Mercedes-Benz | C 220 CDI (W203) | 2000–2003 | OM611 (611.962) | 2.2L CDI |
| Mercedes-Benz | E 220 CDI (W210) | 1999–2002 | OM611 (611.961) | 2.2L CDI |
| Mercedes-Benz | E 270 CDI (W210) | 1999–2002 | OM612 (612.961) | 2.7L CDI |
| Mercedes-Benz | Sprinter 2.2 CDI (W901) | 2000–2003 | OM611 | Van chassis |
| Hyundai | Santa Fe (CM) | 2001–2005 | D4EA | 2.0L CRDi |
| Hyundai | Trajet (FO) | 2000–2005 | D4EA | MPV |
| Kia | Sorento (BL) | 2002–2006 | D4EA | 2.0L CRDi |
| Peugeot | 307 2.0 HDi | 2001–2005 | DW10 (RHS) | Early common rail |
| BMW | 320d (E46) | 2000–2004 | M47D20 (M47TUD20) | 136 hp version |
Critical note: The 0445010136 is a CP1 series pump (not CP3). It is physically different from later CP3 pumps (e.g., 0445010512). Always verify your existing pump part number and engine application before ordering. CP1 pumps typically have a triangular flange with three mounting bolts and a smaller drive tang.
3. Common Failure Symptoms & Installation Replacement Advice
CP1 pumps are robust but age and fuel contamination take their toll. Recognising failure early prevents injector and rail damage.
Typical failure symptoms of a failing 0445010136 pump:
Hard starting or long cranking – Pump cannot build minimum rail pressure (typically 200 bar) due to worn plungers or a faulty PCV (pressure control valve) on the pump.
Loss of power / limp mode – P0087 (rail pressure too low) or P0093 (fuel system leakage) appear during acceleration.
Engine stall, especially after hot soak – Fuel viscosity drops when hot, internal leakage increases, and rail pressure collapses.
Rough idle / misfire – Unstable rail pressure (±50 bar fluctuation) due to plunger wear or PCV malfunction.
Fuel in engine oil – Drive shaft seal failure allows diesel to leak into timing case and then into oil sump – extremely dangerous (risk of engine runaway).
Metal particles in fuel filter – Indicates internal pump destruction; entire fuel system must be flushed.
P0200 / P0215 codes – Injector circuit or fuel injection pump control circuit codes.
Installation & replacement best practices for CP1 pump (0445010136):
Replace all fuel filters – Install a new OEM‑spec filter (e.g., Mercedes A6110920301) before fitting the new pump.
Flush fuel system if old pump failed – If the old pump sent metal debris downstream, replace the rail, injectors, and thoroughly clean the fuel tank and lines.
Renew all high‑pressure pipe unions – CP1 systems use compression fittings that should not be reused. Install new delivery pipes or at least new union washers.
Replace the drive shaft seal – The new pump may come with a pre‑installed seal; if not, apply clean diesel to the seal lip and carefully install.
Torque pump mounting bolts – Use 22–25 Nm for the three M8 mounting bolts. Over‑torquing cracks the cast iron housing.
Prime the low‑pressure circuit – Use a hand primer (on the filter housing) or a vacuum pump. Never run the starter without priming – dry running destroys the pump within seconds.
Perform rail pressure adaptation – After installation, use diagnostic software (Mercedes STAR, Hyundai GDS, Peugeot Diagbox, BMW INPA, or generic Autel/Launch) to reset adaptation values for the fuel system.
Check for leaks – Run the engine at idle and visually inspect all high‑pressure connections for seepage.
Measure return flow – Pump return flow at idle should be < 800 ml/min. Excessive return indicates internal wear or improper priming.
Note about coding – CP1 pumps themselves do not require coding, but the ECU may need adaptation reset. No injector coding needed unless injectors were also replaced.
4. Why Choose Rsolid Engine Parts as Your Supplier?
At Rsolid engine parts, we specialise in high‑quality diesel fuel injection components:
100% test‑bench verified – Every 0445010136 pump is tested on a common rail test bench for accurate flow, pressure regulation, and leakage (±2% tolerance).
Bosch‑compatible, OE fitment – Direct replacement for original CP1 pumps; matches all dimensions, mounting pattern, and drive coupling.
New build, not remanufactured – All units are newly manufactured to Bosch specifications, not reconditioned with unknown wear history.
Competitive wholesale pricing – Ideal for classic car restorers, repair shops, and parts distributors.
Fast global shipping – Stock available from warehouses in Asia, Europe, and North America.
Expert technical support – Our team helps with identification, torque specs, and diagnostic troubleshooting for CP1 systems.
12‑month warranty – Against manufacturing defects and premature wear.
📧 Contact us for a quote or technical assistance:
✉️ Email: amy@rinjector.com
🌐 Website: www.rinjector.com
